33 U.S.C. § 764
Section, act Mar. 4, 1921, ch. 161, §1, 41 Stat. 1417, Pub. L. 116-283, div. G, title LVXXXV [LXXXV], §8512(a)(13), Jan. 1, 2021, 134 Stat. 4759, related to privilege granted employees of continuing service after retirement and which was limited to a ten year period after Mar. 4, 1921.